CN101262055B - Making technology for polymer lithium battery pole slice - Google Patents
Making technology for polymer lithium battery pole slice Download PDFInfo
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- CN101262055B CN101262055B CN2008100608613A CN200810060861A CN101262055B CN 101262055 B CN101262055 B CN 101262055B CN 2008100608613 A CN2008100608613 A CN 2008100608613A CN 200810060861 A CN200810060861 A CN 200810060861A CN 101262055 B CN101262055 B CN 101262055B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a preparation technique of battery electrode flakes of a lithium polymer battery, solving the shortcoming that the current collector and electrode membrane are laminated and hot-pressed after being cut, which is not conductive to the application of continuous hot pressing afterwards in the prior art. When in production, PET is adopted as a carrier, and the steps are: a. acurrent collector is washed with acid base or alkali acid, and fully rinsed with clean water; b. the washed current collector is coated with a layer of conductive adhesive and fully dried; c. the current collector and the PET are respectively put on a unreeling body and simultaneously unreeled in parallel, leading the current collector to be stuck to the PET in parallel; d. the current collector is coated with the electrode coating and dried; e. the current collector and the PET are simultaneously separated and separately reeled. The electrode coating is adopted to directly coat on a copper-aluminum foil or copper-aluminum net, thereby realizing continuous thermal pressing process of the current collector and the electrode coating, reducing production procedure, improving production efficiency and reducing production cost.
Description
Technical field
The present invention relates to a kind of making technology for polymer lithium battery pole slice that can carry out continuous operation.
Background technology
Flourish along with information technology, people are more and more higher to environmental protection requirement, the attention degree of environmental pollution also improves constantly, and lithium secondary battery is with advantages such as its high-energy-density, high voltage, small size, light weight and fail safe are good, obtain huge development, become the main novel energy of communication class product.
At the lithium secondary battery production field, the liquid lithium ionic cell pole piece is to make by adhere to one deck electrode slurry on collector, and poly-lithium battery is to make by the copper after punching, the online adhesive electrodes slurry of aluminium.At present, the copper of the punching mouth that adopts in the polymer lithium battery pole slice manufacture process, aluminium are coated with the net slurry on the net, aluminium is coated with the net slurry on the net and electrode slurry system film separates, the mode of lamination hot pressing again after copper aluminium net and electrode film are cut, production process is loaded down with trivial details, be unfavorable for the enforcement of back continuous hot pressing process, can cause the raising of production intensity like this, cause productivity ratio to descend, cost increases.
Summary of the invention
The invention solves after collector and electrode film are cut in the prior art again, lamination hot pressing is unfavorable for the shortcoming that the operation of back continuous hot-press is implemented, a kind of continuous electrode slurry mode that is coated with is provided, helps the making technology for polymer lithium battery pole slice of the enforcement of collector and electrode slurry continuous hot-press operation.
It is loaded down with trivial details that the present invention has also solved in the prior art production process, causes production intensity to increase, and production efficiency reduces, the shortcoming that cost increases provides a kind of electrode slurry that is coated with continuously, can reduce operation, reduce production intensity, the making technology for polymer lithium battery pole slice of enhancing productivity.
The technical solution adopted for the present invention to solve the technical problems is: a kind of making technology for polymer lithium battery pole slice, when it is characterized in that making with PET as carrier, comprise the steps:
A, clean earlier, the collector of punching is carried out pickling or Superficial Foreign Body is removed in alkali cleaning;
B, the collector after will cleaning are rinsed back coating one deck conducting resinl, fully oven dry then well;
C, collector and PET be placed on separately unreel on the body, and carry out parallel unreeling simultaneously, make above the parallel PET of being attached to of collector;
D, electrode slurry are coated on the collector, and with it oven dry;
E, collector separate independent rolling simultaneously with PET.
Collector is copper, aluminium foil or copper, the aluminium net of punching.
The limit of 10-50mm is reserved on the both sides of copper, aluminium foil, and copper, aluminium net are for tiltedly drawing the rhombus net, and the porosity of collector is 20-80%.Aperture on the control sets fluid is between 1.0-1.5mm, and porosity plays a part very important to the extraction process in road, back.
Copper mesh or Copper Foil adopt pickling, and aluminium net or aluminium foil adopt alkali cleaning, also will carry out surfactant washing before cleaning, to remove greasy dirt.Pickling and alkali cleaning are not carried out simultaneously, and the purpose of cleaning is to remove oxide on surface, and wherein the concentration of pickle is 0.2-0.5mol/L, and the time of cleaning is 30-60s, and the temperature of cleaning is controlled at 30-50 ℃; The concentration of alkali wash water is 0.5-10.mol/L, and the time of cleaning is 30-60s, and the temperature of cleaning also is controlled at 30-50 ℃; Surfactant concentration is controlled at the water quality ratio is 1/8-1/10, and the time of cleaning is 60-90s, and temperature also is controlled at 30-50 ℃; Clean the back and use clear water drip washing, and under 70-100 ℃ of temperature, dry.
Collector is parallel with PET when unreeling, and needs respectively the processing of rectifying a deviation to collector and PET.Correction is the gauffer that causes in order to control relative displacement between coating precision and control PET and the collector, and collector wants consistent with the correction of PET.
Correction difference when correction is handled is 1-2mm.
The thickness that conducting resinl is coated on the collector is 5-10 μ m.
The viscosity of electrode slurry is 3000-10000mpa.s.
Adopt baking oven when oven dry, the big vast road in the baking oven is a horizontal type, and drying time is controlled at 40-70s under 40-55 ℃ of temperature.The wet coating layer thickness of electrode slurry coating is 400-1000 μ m, and oven dry back coating layer thickness is 100-200 μ m.
Collector adopts the scraper that is arranged on the applicator roll to be coated with when the coating electrode slurry, and the control coating speed is 5-8m/min.
Angle during coating between scraper and the collector is 0-30 °.
The invention has the beneficial effects as follows: electrode slurry directly is coated on the copper aluminium foil or copper aluminium is online, can realize the continuous hot pressing process of collector and electrode slurry, reduced production process, enhance productivity, reduce manufacturing cost, be coated with the electric core that the electrode slurry mode is made on the net at copper aluminium foil or copper aluminium, it discharges and recharges, multiplying power discharging and cycle performance of battery excellence.
Description of drawings
Fig. 1 is a kind of electrode slurry process chart that is coated with continuously of the present invention;
Fig. 2 is a kind of electrode slurry coating of the present invention schematic diagram;
Among the figure: 1, collector let off roll, 2, the PET let off roll, 3, collector, 4, PET, 5, hopper, 6, scraper, 7, baking oven, 8, the pole piece wind-up roll, 9, the PET wind-up roll.
Embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: a kind of making technology for polymer lithium battery pole slice (referring to accompanying drawing 1 accompanying drawing 2), during making with PET4 as carrier, comprise the steps:
A, cleaning: choosing porosity is 40%, the aperture be the Copper Foil of 1.2mm as collector 3, the limit of 20mm is reserved on the both sides of Copper Foil, earlier Copper Foil is removed greasy dirt, clean with activating agent, it is 1/9 that activating agent is controlled at the water quality ratio, under 40 ℃ temperature, clean 70s, carry out pickling again, the concentration of pickling is controlled at 0.3mol/L, under 35 ℃ temperature, clean 70s, rinse well with clear water then and under 80 ℃ temperature, dry;
B, be coated with conducting resinl: coating one deck conducting resinl on the clean collector of oven dry, the thickness of conducting resinl is 8 μ m, then fully oven dry;
C, unreel: collector is placed on the collector let off roll 1, PET is placed on the PET let off roll 2, and carries out parallel unreeling simultaneously, make above the parallel PET of being attached to of collector, to collector and the PET processing of rectifying a deviation, the correction difference when correction is handled is 1.5mm respectively;
D, be coated with the anode and cathode slurry: to choose viscosity be the electrode slurry of 8000mpa.s and be placed in the hopper 5, adopts the scraper 6 that is arranged on the applicator roll to be coated with, and the angle between scraper and the collector is 20 °, and the control coating speed is 6m/min;
E, oven dry: the collector and the PET that will be coated with electrode slurry are the baking oven 7 of horizontal type through drying tunnel, dry under 45 ℃ of temperature, and the time of oven dry is 50s;
E, rolling: adopt collector wind- up roll 8 and 9 pairs of collectors of PET wind-up roll to separate independent rolling simultaneously with PET.
Embodiment 2: a kind of making technology for polymer lithium battery pole slice (referring to accompanying drawing 1 accompanying drawing 2), during making with PET4 as carrier, comprise the steps:
A, cleaning: choosing porosity is 60%, the aperture be the aluminium foil of 1.5mm as collector 3, the limit of 20mm is reserved on the both sides of aluminium foil, earlier aluminium foil is removed greasy dirt, clean with activating agent, it is 1/10 that activating agent is controlled at the water quality ratio, under 45 ℃ temperature, clean 90s, carry out alkali cleaning again, the concentration of alkali cleaning is controlled at 0.8mol/L, under 45 ℃ temperature, clean 50s, rinse well with clear water then and under 100 ℃ temperature, dry;
B, be coated with conducting resinl: coating one deck conducting resinl on the clean collector of oven dry, the thickness of conducting resinl is 10 μ m, then fully oven dry;
C, unreel: collector is placed on the collector let off roll 1, PET is placed on the PET let off roll 2, and carries out parallel unreeling simultaneously, make above the parallel PET of being attached to of collector, to collector and the PET processing of rectifying a deviation, the correction difference when correction is handled is 1mm respectively;
D, be coated with the anode and cathode slurry: to choose viscosity be the electrode slurry of 6000mpa.s and be placed in the hopper 5, adopts the scraper 6 that is arranged on the applicator roll to be coated with, and the angle between scraper and the collector is 40 °, and the control coating speed is 5m/min;
E, oven dry: the collector and the PET that will be coated with electrode slurry are the baking oven 7 of horizontal type through drying tunnel, dry under 55 ℃ of temperature, and the time of oven dry is 40s;
E, rolling: adopt collector wind- up roll 8 and 9 pairs of collectors of PET wind-up roll to separate independent rolling simultaneously with PET.
Claims (10)
1. making technology for polymer lithium battery pole slice, when it is characterized in that making with PET as carrier, comprise the steps:
A, clean earlier, the collector of punching is carried out pickling or Superficial Foreign Body is removed in alkali cleaning;
B, the collector after will cleaning are rinsed back coating one deck conducting resinl, fully oven dry then well;
C, collector and PET be placed on separately unreel on the body, and carry out parallel unreeling simultaneously, make above the parallel PET of being attached to of collector;
D, electrode slurry are coated on the collector, and with it oven dry;
E, collector separate independent rolling simultaneously with PET.
2. making technology for polymer lithium battery pole slice according to claim 1 is characterized in that described collector is copper, aluminium foil or copper, the aluminium net of punching.
3. making technology for polymer lithium battery pole slice according to claim 2 is characterized in that the both sides of described copper, aluminium foil reserve the limit of 10-50mm, and copper, aluminium net are for tiltedly drawing the rhombus net, and the porosity of collector is 20-80%.
4. making technology for polymer lithium battery pole slice according to claim 1 when it is characterized in that described collector is parallel with PET and unreeling, needs respectively the processing of rectifying a deviation to collector and PET.
5. making technology for polymer lithium battery pole slice according to claim 4 is characterized in that the correction difference when described correction is handled is 1-2mm.
6. making technology for polymer lithium battery pole slice according to claim 1 is characterized in that the thickness that described conducting resinl is coated on the collector is 5-10 μ m.
7. making technology for polymer lithium battery pole slice according to claim 1, the viscosity that it is characterized in that described electrode slurry is 3000-10000mpa.s.
8. making technology for polymer lithium battery pole slice according to claim 1 is characterized in that adopting baking oven when oven dry, and the big vast road in the baking oven is a horizontal type, and drying time is controlled at 40-70s under 40-55 ℃ of temperature.
9. making technology for polymer lithium battery pole slice according to claim 1 is characterized in that described collector adopts the scraper that is arranged on the applicator roll to be coated with when the coating electrode slurry, the control coating speed is 5-8m/min.
10. according to claim 1 or 7 or 9 described making technology for polymer lithium battery pole slice, the angle when it is characterized in that being coated with between scraper and the collector is 0-30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100608613A CN101262055B (en) | 2008-03-24 | 2008-03-24 | Making technology for polymer lithium battery pole slice |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100608613A CN101262055B (en) | 2008-03-24 | 2008-03-24 | Making technology for polymer lithium battery pole slice |
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| CN101262055A CN101262055A (en) | 2008-09-10 |
| CN101262055B true CN101262055B (en) | 2010-12-08 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179346A (en) * | 2011-04-28 | 2011-09-14 | 东莞市九州浩德新能源设备有限公司 | Mesh coating machine and method |
| CN102683043A (en) * | 2012-03-28 | 2012-09-19 | 长沙海密特新能源科技有限公司 | Super-capacitor pole piece with low internal resistance and manufacturing method thereof |
| CN103137945B (en) * | 2013-02-27 | 2015-09-16 | 浙江吉能电池科技有限公司 | The preparation method of electrodes of lithium-ion batteries and surface processing device |
| WO2015156060A1 (en) * | 2014-04-10 | 2015-10-15 | 加川 清二 | Method and device for manufacturing microporous metal foil |
| CN104681871B (en) * | 2014-09-04 | 2017-02-15 | 中天储能科技有限公司 | Method for increasing battery liquid injection speed |
| CN104868101A (en) * | 2015-04-03 | 2015-08-26 | 河北神州巨电新能源科技开发有限公司 | Manufacture method of polymer battery cathode |
| CN105355840A (en) * | 2015-10-20 | 2016-02-24 | 四川科能锂电有限公司 | Coating and rolling-in all-one-one machine for electrode |
| CN105355449A (en) * | 2015-11-27 | 2016-02-24 | 中国科学院电工研究所 | Preparation method of electrode, and apparatus |
| CN105513833A (en) * | 2015-12-24 | 2016-04-20 | 宁波南车新能源科技有限公司 | Coating system of lithium ion capacitor electrodes and coating method of coating system |
| CN108923016A (en) * | 2018-06-11 | 2018-11-30 | 合肥国轩高科动力能源有限公司 | A kind of porous current collector coating method |
| CN109360940B (en) * | 2018-09-26 | 2021-10-22 | 桑顿新能源科技(长沙)有限公司 | Coating method of microporous foil of lithium battery pole piece |
| CN109638359B (en) * | 2018-12-12 | 2024-04-05 | 广东新宇智能装备有限公司 | Die cutting lamination integrated forming process |
| CN112974112B (en) * | 2021-01-23 | 2021-11-30 | 山东小旋蜂电动科技有限公司 | Can prevent inhomogeneous lithium-ion battery pole piece coating equipment in coating both sides |
| CN114551809B (en) * | 2022-02-24 | 2022-10-28 | 广东日信高精密科技有限公司 | Lithium battery electrode plate impression device |
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Effective date of registration: 20211108 Address after: No.855, Jianshe 2nd Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee after: Wanxiang A123 Co.,Ltd. Address before: 311215, Wanxiang District, Xiaoshan District, Zhejiang, Hangzhou Wanxiang Group Technology Center Patentee before: WANXIANG GROUP Co.,Ltd. Patentee before: WANXIANG EV Co.,Ltd. |
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